<template>
  <div class="addgoods">
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        align-center
        finish-status="success"
      >
        <!-- activeIndex - 0：将字符串转化为数字的简洁操作 -->
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- Form表单只能放在el-tabs的外面，不能放在el-tabs和el-tab-pane之间 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cascaderProps"
                @change="handleChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  :label="cb"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input> </el-form-item
          ></el-tab-pane>
          <el-tab-pane label="商品图片">
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreviewImage"
              :on-remove="handleRemoveImage"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleUploadSuccess"
              :on-error="handleUploadError"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <!-- <div slot="tip" class="el-upload__tip">
                只能上传jpg/png文件，且不超过500kb
              </div> -->
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" class="btnAdd" @click="addGoods"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%"
      class="previewImgDialog"
    >
      <img :src="previewPath" alt="图片预览" style="width:100%;height:100%" />
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'addgoods',
  components: {},
  data() {
    return {
      activeIndex: '0',
      //   添加商品表单
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        // 商品分类
        goods_cat: [],
        // 上传图片数组
        pics: [],
        // 商品详情介绍
        goods_introduce: '',
        // 商品的参数（数组），包含 `动态参数` 和 `静态属性`
        attrs: []
      },
      //   添加商品表单验证
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      //   所有商品分类数据列表
      cateList: [],
      // 级联选择器cascader配置选项
      cascaderProps: {
        expandTrigger: 'hover',
        // checkStrictly: true, // 是否可以选中任意一个且只能是一个，不分层级
        value: 'cat_id', // 选中的实际值
        label: 'cat_name', // 展示时的label标签显示
        children: 'children' // 层级之间的联系
      },
      //   动态参数列表数据
      manyTableData: [],
      //   静态属性列表数据
      onlyTableData: [],
      // 上传的URL地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      //   设置请求头对象token
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      //   图片预览路径
      previewPath: '',
      //   控制图片预览弹框显示
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  mounted() {},
  methods: {
    //   获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      //   console.log(res)
      //   把数据列表赋值给cateList
      this.cateList = res.data
      console.log(this.cateList)
      //   this.$message.success('获取商品列表成功')
    },
    // 处理级联选择器的改变操作
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
      //   console.log(this.addForm.goods_cat)
    },
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    async tabClicked() {
      console.log(this.activeIndex)
      if (this.activeIndex === '1') {
        console.log('动态参数')
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'many'
            }
          }
        )
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        })

        this.manyTableData = res.data
        console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        console.log('静态属性')
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'only'
            }
          }
        )
        if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
        // res.data.forEach(item => {
        //   item.attr_vals = item.attr_vals ? item.attr_vals.split(' ') : []
        // })
        this.onlyTableData = res.data
        console.log(this.onlyTableData)
      }
    },
    // 上传图片删除
    handleRemoveImage(file) {
      console.log(file)
      // 1.获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2从pics数组中找到这张图片的索引值
      const index = this.addForm.pics.findIndex(e => {
        return e.pic === filePath
      })
      // 3.调用splice方法，将图片从pics数组中移除
      this.addForm.pics.splice(index, 1)
      console.log(this.addForm)
    },
    // 上传图片预览
    handlePreviewImage(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理上传成功回调事件
    handleUploadSuccess(res) {
      console.log('成功==>', res)
      //   1.拼接得到一个图片信息对象
      const picInfo = { pic: res.data.tmp_path }
      if (res.meta.status !== 200) {
        return this.$message.error('上传图片失败，原因：' + res.meta.msg)
      } else {
        // 2.将图片信息对象push到数组中
        this.$message.success('图片上传成功！')
        this.addForm.pics.push(picInfo)
        console.log(this.addForm)
      }
    },
    // 处理上传失败回调事件
    handleUploadError(err) {
      console.log('失败==》', err)
    },
    // 添加商品
    addGoods() {
      console.log(this.addForm)
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          this.$message.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        // 使用lodash.cloneDeep方法对addForm进行深拷贝，相当于重新拷贝一份addForm进行操作，对原来的addForm不产生影响
        const form = _.cloneDeep(this.addForm)
        // 之所以要使用深拷贝后的form进行操作，是由于this.addFor.goods_cat在cascader级联选择器中是通过v-model绑定的，这里对它转换为字符串,会影响双向绑定
        form.goods_cat = form.goods_cat.join(',')
        // console.log('动态==》', this.manyTableData)
        // console.log('静态==》', this.onlyTableData)
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log('form==>', form)
        // console.log('this.addForm==>', this.addForm)

        // 发起请求，添加商品
        // 商品名称必须是唯一的，不可添加重复商品
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error(res.meta.msg)
        this.$message.success('添加商品成功！')
        // 跳转
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
/* @import url(); 引入公共css类 */
.el-steps {
  margin: 15px 0;
}
.el-checkbox {
  margin: 0 10px 10px 0 !important;
}
.btnAdd {
  margin-top: 20px;
}
</style>
<style lang="less">
.el-step__title {
  font-size: 14px;
}
/* 解决cascader溢出的问题 */
.el-cascader-panel {
  height: 200px;
}
.previewImgDialog .el-dialog__body {
  padding: 20px !important;
}
</style>
